Metal-founder&#39;s flask.



Patented MarL7,1911.

3 BHEETS-BHEET 1.

W. J. KEEP. METAL IOUNDERS FLASK. APPLICATION FILED SEPT. 11, 1909.

3 SHEETS-SHEET 2.

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W; J. KEEP; METAL FOUNDERS FLASK. APPLICATION FILED SEPTJl, 1909.

Patentd M11117, 1911.

3 SHEETS-SHEET- 3.

Ehmrniur differences in shrinkage.

tllll s -anr are WILLIAM J'. KEEP, OF DETROIT, MICHIGAN.

METAL-FOUNDERS FLASK.

Specification of Letters Patent.

Patented Mar. *7, 1911.

To all whom it may concern:

Be it known that I, VVILLIAM J. KEEP, a citizen of the United States,residing at Detroit, county of Vayne, State of Michigan, have invented acertain new and useful Improvement in ltletal-Founders Flasks, anddeclare the following to be a full, clear, and exact description of thesame, such as will enable others skilled in the art to which it pertainsto make and use the same, reference being had to the accompanying d'awings, which form a part of this specification.

My invention relates to founders flasks.

It has for its object an improved flask in which there is a match plate,with interconnecting means between the flask and the match plate of acharacter such that the match plate may be lifted out from theopened-out flask without actually removing the cope part of the flaskfrom the drag part thereof, and nevertheless, will be accurately guidedto its proper position with respect to the upper and lower parts of theflask when the structure is used. The match plate, when in positionbetween the flask members whether they be opened or closed, and whetherthe match plate be closed entirely down on the drag or partially liftedtherefrom, is inca iable of lateral movement, and nevertheless, theconnecting members are so constructed that any one of a number ofslightly different match plates may be used interchangeably with aplurality of flasks, this peculiar feature of interchangeable use beingdesirable because of the difliculty that exists from inequalities of theshrinkage of metal and accidental irregularities of measurement inproducing entire uniformity of interchangeable parts. This is especiallydesirable, because in the flask which forms the subject of thisinvention the match plate, or some parts of the match plate arefrequently made of castmetal, and cast metal plates are liable tovariation because of the To accomplish this I construct one of thehinges of the flask with a comparatively narrow V-shaped cavity and theother one of the hinges with a V-shaped cavity broader along the axis ofthe hinge in order that one of the projections from the match plateengaging in the narrow cavity may prevent what I will call side motion,that, is, motion along the axis of the hinge, while the other projectionengaging in the broader ca'vity co-acts with the first to prevent foreand aft motion on that end of the match plate.

Another feature of the invention is found in a support used with thedrag part of the flask to sustain the rear edge or back of the 1 dragpart of the flask when the cope part of the flask is turned to anupright position, and the weight of the cope and its contained sand isbrought overthe rear edge of the drag. This is rendered necessarybecause in the use of the match plates, the flask is usually one that isfilled by machine process and the press board used in machine work doesnot act like the ordinary bottom board to sustain the flask as a whole,but only sustains the sand within the flask and generally does notitself sink entirely into the flask, and thus presents a projectionbelow the flask leaving the flask body proper without sup port otherthan that of the sand that is packed within it.

Another object of the invention relates to the construction of the matchplate in a way to be treated to change its effective thickness byplacing blocks on the four corners of the flask proper, which arecompensated for by dressing the corresponding contact surfaces of thematch plate and thereby regulating the distance between the cope and thedrag when they are closed together.

In the drawings :-Fignre 1, is a perspective showing the drag in itshorizontal position, the cope in its vertical position, andthe-matchplate partly lifted from its position on the drag. Fig. 2, is across section of the closed flask with the matchplate interposed. Fig.3, is a side elevation (showing only the meeting edges) of the flask.Fig. 4, is a section, on an enlarged scale, through the two leaves ofthe hinge that join the cope and the drag, and through the pintle whichforms the bearing part of the matchplate. Fig. 5, is a section showingin detail the same parts that are shown in Fig.

4; the cope is swung up. Fig. 6, is a cross section, through the copeand drag, the matchplate being removed. Fig. 7, is a cross section,showing the same parts as Fig. 6 in lowered position. Fig. 8, is a planview, showing the corner construction of the matchplate. Fig. 9, is aplan view of a corner of the drag, showing part of a hinge. Fig. 10, isa perspective of the same corner. Fig. 11, is a reverse plan view of thehinge edge of the cope,'showing the dif ferent construction of the Vshaped cavity at the two ends. Fig. 12 is a cross section of a flask andmatchplate, showing a mold spoiled because not supported at the rear.

The drag member 1 of the flask is a rec tangular box without a bottom,adapted to be filled with sand in the ordinary way, but having the sandcompressed within it by the use of the press board and a lever press;this member of the flask is provided at its front edge with projectinglugs, from which rise pins 11, adapted to engage through holes in lugsthat project from the cope part 6 of the flask. At the rear or hingeedge there are parts which project and serve as bearings, and which maybe considered as parts of hinges. The hinge member which is secured tothe drag is a horn shaped member 3, curved and having its upper face 3inclined to meet at a common line along the upper surface of the horn.In front of the horn, and between it and the terminal of the hinge,which is close to the wall of the drag, there is formed a cayity 9,which is semi-circular in that cross section which is parallel with thecross axis of the drag; the sides of this cavity are inclined, giving tothe cavity the shape of the half of a hollow cone; in this cavityengages a double conical pintle 8 on the matchplate 7. That part of thehinge which is secured to the cope is provided with a hinge member thatextends to the rear, and is curved to nearly a full circle. It would bea full circle were it not for the neck part which holds it to the cope;in the head-like projection thus formed is a circular groove 5,triangular in cross section, inclosed between two conical surfaces whichdiverge from the bottom of the groove 5 to the surface st, and theseconical surfaces extend for nearly a full circle, producing a structurethat may be compared to a spool, and which for convenience may be calleda spool. This spool-like part of the hinge is adapted to engage on theinclined upper surfaces of the horn member 3, and serves as a pintle forthe turning movement of the cope when it is swung with respect to thedrag. Primarily, and when the matchplate is in place, the surface of thespool does not engage on the surface of the horn member, but is sorelated to it that the one part is kept from shifting endwise withrespect to the other, and when so assembled the cope member of the hingeis lifted above its nor mal seat on the horn by reason of its engagementon the. pintle S of the matchplate. In front of the spool portion of thecope member is a cavity 8, nearly semi-circular in its cross-sectionacross the flask, and with inclined surfaces, which, in the closedcondition of the several parts of the flask, engage closely over thepintle 8. A second cavity 8 at the other end of the flask is nearlysimilar in construction except, however, that the cavity 8 at the oneend of the cope is narrow along the axis of the hinge as com pared withthe cavity 8 of the companion hinge. The pintle 8 is circular, or nearlyso, and made either as a part of, or secured to, the matchplate,projecting about onehalf its diameter beyond the rear edge of thematchplate, and one-half its diameter above the middle line of thematchplate, and one-half its diameter below the middle line of thematchplate. It forms a secondary pintle for the hinge members of thecope and drag, on which the cope swings as a bearing in its movementwhen the cope is swung either to open or close the flask with thematchplate included thereon. Preferably the pintle 8 is an integral partof a piece of hard metal 8 formed with interlocking projections Sadapted to be secured in the body of the matchplate by casting thematchplate in proper relation with the pintle and its immediateconnections; the main body of the matchplate is of lighter and softermetal.

In operation, the parts are placed in closed relation, with thematchplate between the cope and the drag, and held in its properrelation thereto by the pins 11, and by the rearwardly extendingprojections from the matchplate, which engage in the V shaped openingsof the spool of the flask hinges. The cope and the drag are brought intoproper register by means of the pins 11 and the horns of the hinge whichengage with. the spools, the groove of the one part engaging the ridgeof the other part. If the flask be alarge one, it is placed on thefloor, and the sand filled in and rammed. If the flask be a small one,it may be rammed, but it is preferably placed on a machine and squeezed.On the large flask the sand is leveled off and the bottom board, whichextends beyond the sand and engages the walls of the flask itself, isplaced upon the level sand, and the entire flask is turned over, inorder that the other side of it may be filled and completed. .If theflask is small the drag is filled with sand, the bottom'board 12,adapted to engage inside the walls of the flask, is placed on the sand,the entireflask is turned over on the press, the cope is filled, leveledoff, and the press board placed upon it, and with a squeezer both boardsare forced into the flask until the sand in both is packed to therequired amount. The sand in this case is placed between each of thesqueezing boards and each side of the matchplate. In the large flask.the entire frame thereof is supported by the bottom board, and the copemay be swung upward from the drag for the purpose of removing thematchplate. In a small flask, in which the sand has been pressed by thesqueezer, the frame of the drag is not supported for the reason that thebottom board is smaller seems than the inside of the drag, and affordsno support to the frame of the drag. The weight of the frame of thecope, and of the sand in the cope, primarily rests upon the matchplate,and this in turn engages closely on the sand packed in the drag, whichin its turn rests on the bottom board, and this on the bed plate 13 ofthe squeezer. The frame of the drag, however, is not supported, but isheld up by its adhesion to the sand packed within it. plate from boththe large and small flasks, the cope is swung, and this brings itsentire weight upon the horns of the flask hinges, which extend to therear from the drag part of the flask, and in the small flask using theinclosed press boards there is now no support sufficient to sustain thegreat weight which is now brought to bear on the rear of the drag frame.I place under the frame part of the drag adjustable sustaining members17, which may be adjusted to correspond with tlie amount that the pressboard protrudes from the drag after the sand has been properlycompressed within it. A simple form of such sustaining members consistsof pins 17 that project through the table on which the flask issupported (the table of the press) these pins engage through bosses 14:that rise from surfaces of the table and are lifted by wedges 15, onwhich the bottom ends of the pins rest. The wedges are pushed in by theworkman and withdrawn by the workman who grasps the cross bar 16 whichconnects the two wedges. If the mold produces a casting that is toothick, the four corners 18 of the cope or 19 of the drag are dresseddown so as to allow the cope and drag to come nearer together, when thematchplate is removed and the flask is closed; or by adding a sheet ofmetal to all corners, the cope and drag will be forced farther apart,and when the matchplate is removed and the flask closed, a thickercasting will be produced.

lVhat I claim is 1. In a molding device, in combination with a hingedmember for the drag, a hinge member for the cope provided with a Vshaped recess formed as part of the groove around the pintle part of thehinge member, a match plate provided with a rearward projection V shapedin cross section adapted to engage in said recess eccentric to the axisof the said pintle and prevent the match plate from shifting.

2. In a molding device, in combination with a knuckle hinge membersecured to the drag, a pintle hinge member secured to the cope providedwith an angular groove around the pintle, a match plate provided with aprojection angled in cross section to correspond with said angulargroove and adapted to engage therein eccentric to the axis of saidpintle, substantially as described.

In order to remove the match 3. In a molding device, the combination ofa hinge having a V-shaped recess 8, a match plate provided with rearwardex tending projections angled in cross section to correspond with saidV-shaped recesses 8*, and adapted to engage therein, a second hinge alsoprovided with a V-shaped recess 8 broader in extent along the axis ofthe pintle than the V-shaped recess 8 of the first mentioned hinge, asecond rearward projection from the match plate adapted to engage insaid second recess, substantially as described.

st. In a molding device, a flask provided with a pair of hinges, one ofwhich is provided with a V-shaped recess 8 of definite extent, and thesecond of which is provided with a V-shaped recess 8 differing from thefirst-mentioned recess combined with a match plate provided with twoprojections, which projections extend from the rear edge of said matchplate and are adapted to engage in the said recesses, substantially asdescribed.

5. In a molding device, a cope having spool shaped pintles in its hingeprovided with V shaped recesses both at the front and the rear of saidpintles, a drag provided with hinge portions having horn-likeprojections adapted to engage at the rear of said pintle and underneaththe same, and a match plate having rearward extending projectionsadapted to bear in the V shaped recesses at the front of said spools,whereby the cope when tilted is actuated to bring the spool shapedpintles into proper engagement with the surface of the horns be-' neaththe pintles, substantially as described.

6. In a molding device, a cope hinge member having spool shaped pintleswith V shaped recesses at both the front and the rear thereof, a draghinge member having a horn-like projection adapted to engage therearmost recess and under the pintle, a match plate having a rearwardprojection angular in cross section adapted to engage in the V shapedrecess in front of said pint-1e eccentric to the axis thereof and toserve as an auxiliary pintle on which the cope rests and around which itturns, substantially as described.

7. In a molding device, the combination of a cope provided with a spoolshaped pintle portion having V shaped recesses at the front and rearthereof, a match plate provided with a rearward projection adapted tobear in a V shaped recess at the front of the spool, horns V shaped incross section rising and engaging in the rear V shaped recess of thespool and curving below the said spool pintle and adapted to actuate thecope in its proper relative location when tilted, substantially asdescribed.

8. In a molding device, the combination of a cope and a drag havinghinged connection at their rear edges, a match plate provided with anauxiliary pintle member, pressure boards engaging within the boundariesof the cope and the drag and a support adapted to engage the rear edgeof the drag frame and adapted to hold it in its sustained relation withrespect to said pressure board when the cope is tilted and the weight ofsaid cope transferred from a uniform weight over said drag to anunequalized weight on the rear edge thereof, substantially as described.

9. In a molding device, in combination with a flask a separable hingetherefor, a matchplate provided with an auxiliary pintle adapted toengage between the separable members of the hinge eccentric to the mainpintle thereof, a support adapted to engage the rear edge of the dragmember of said flask, and a bottom press board adapted to engage withinthe flask, substantially as described.

10. In a molding device, the combination of a cope and a drag, hingedtogether, a match plate removable from between said cope and drag,pressure boards adapted to engage within the cope and the drag and meanswhereby the drag frame is sustained with respect to said pressure board,substantially as described.

11. In a molding device, the combination of a cope and a drag, hingedtogether, with hinges constructed to form V shaped recesses both at thefront and the rear of the hinge pintles, a match plate provided withrearwardly extending projections adapted to register with such recesses,cup shaped recesses in the drag part of the hinges, projections to formacomplement to said recesses on the match plate extending below theupper surface thereof adapted to form a close rolling and lateralengaging contactin the recess 8 and a rolling contact free from lateralengagement in the recess 8 substantially as described.

12. In a molding device, having in combination hinged cope and dragmembers, said hinges being formed with V-shaped recesses 8 and 8 at thefront and with cup-shaped cavities on the lower members of said hinges,a match plate having rearward projections complementary to said recessesand cavities adapted to engage therein, the said rearward projectionsbeing extended both above and below the surface of the said match plate,and constituting a secondary pintle eccentric to the main pintle, ofsaid hinges, substantially as described.

13. In a molding device, in combination, hinged cope and drag membersand a match plate adapted to be inserted therebetween, projectionslocated on the corners of the flask members adapted to space the matchplate from the main run of the surface of the flask members,substantially as described.

H. In a molding device consisting of a cope and a drag member and amatch plate adapted to be inserted between the cope and the drag member,separable hinges on said cope and drag members, a pair of hinge pintleson said match plate adapted to en gage with the separable hinges on thecope and the drag, one of said hinge pintles on said match plateengaging in a cavity comparatively narrow along the axis of the hinge,and the other of said pintle members on said match plate engaging in acavity wider along the axis of the hinge pintle than the length of thehinge pintle whereby in the assembled structure, the said match platemay be utilized with any one of a plurality of pairs of flask membersand there is afforded compensation for inaccuracies in the constructionand size of the match plate, substantially as described.

15. In a molding device having in combination a cope and a drag hingedtogether, a bottom pressure board adapted to engage within the moldingdevice, a support to sustain the rear end of the drag member withrespect to said pressure board when the pressure board is positionedpartially within the d ag member and the cope is swung up on its hinges,thereby transferring its weight from its normally equal distributionover the drag and bringing it entirely upon the rear edge of the drag,substantially as described.

In testimony whereof, I sign this specifi cation in the presence of twowitnesses.

IVILLIAM J. KEEP.

Witnesses CHARLES F. BURTON, VIRGINIA C. SPRA'TT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

